Plug for a drinking container



FIG. 1 is a front perspective view of a plug for a drinking container showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevational view thereof; and,

FIG. 5 is a right side elevational view thereof. 

The ornamental design for a plug for a drinking container, as shown and described. 